ETA SA 450-121

The ETA caliber 450-121 is a Swiss quartz movement featuring a day/date calendar complication displayed at the 3:00 position. It shares its architecture with the caliber 450.111, which includes only the date function at that position. The movement is noted for its exposed gear train design in certain applications. This caliber has been widely used in entry-level watches from various brands within the Swatch Group portfolio.